Strollers and car seats!

What have been your favorites? We are currently looking at the Uppababy although it is pricier, but seems to be better quality and safer. We really like how it can transform and adjust as baby grows and can add on parts for future children, etc. Our other option is the Britax B-free. I just don’t like how car seats nowadays seem to meet the minimal safety requirements and feel so cheaply made.... if you have had either of these please share your opinions and if you have a different combo you swear by, I’d love to know!